Abstract: This paper tends to estimate the mean values of direct solar radiationover a vertical surface as well as total solar radiation on horizontal su-rface under fine weather conditions on hourly,monthly,seaonal,andannual bases in the Beijing Region by using the observational data of so-lar radiation and sunshine record obtained at one-hour interval in Beijingfrom May 1957 to April 1967.It also gives the average time intervals andnumber of hours in terms of direct solar radiation and total solar radiationthat are available for industry in individual days each month.According tosunshine-record analysis,109.2k.cal./cm².year of direct solar radiationover a vertical surface and 89.4 k.cal./cm².year of total solar radiationon horizontal surface in a clear day may be attainable.The annual hoursof effective sunshine are 2287;while the average deviation of intra annu-al effective solar radiation is mostly less than 9%.